صدها مجله دانشگاهی "رایگان" شروع به دریافت هزینه کرده اند

Hundreds of ‘free’ academic journals have started charging fees

Nature, Published online: 22 September 2026; doi:10.1038/d41586-026-02818-5 A study tracking diamond open-access journals has found an increase in titles switching to other publishing models — especially over the past few years.